SPN 3223 FMI 7 | Inlet NOx Sensor Went Bad | DD15 2016 Cascadia | OTR Performance Diagnostic Tool

[@ewright7739]

Do you have to regen when you add the new sensor.

[@thegoldentrucker]

Technically no, you can just clear the code but that's only if you know 100% the sensor is genuine and is working properly. As long as the trucks computer is not getting any errors from the new sensor, you should be good. I highly suggest you do. I did do a regen but that was because it was an aftermarket sensor and I was already home. If the sensor was bad, I could've easily gotten an OEM part locally.